Brake-actuating mechanism for motor vehicles



- May 5, 192 5.

D. F. DQMIZI BRAKE ACTUATING MECHANISM FOR MOTOR VEHICLES FiledMay 14, 1925: 3 Sheets-Sheet 1 May '5, 1925.

D. F. DOMIZI 81mins: ACTUATING MECHANISM FOR MOTOR VEHICLES Filed May 14. 1925 '3 sheets sheet 2 attorneq g May 5, 1925.

D. F. DOMIZI I BRAKE ACTUATING MECHANISM FOR MOTOR VEHICLES Filed May 14, 92 3 Sheets-Sheet 3 V 7 27 s i -i L: 7 I V F" QT? .a. I I 40 1 I 5 28 3944-4 2 -36 4 (53 V 35 l I 3/ 38 .20 32 is /9' 76 39 I I 4 gntuefifoz L Z I Z I L -4 I 5 as 47 45 47 44 46 40 "t C/ 732L401, 7' 7 Q MW";

i 2 in the accompanying drawings, fully dean outwardly offset forwardly projecting Patented May 5, 1925 V UNITED STATES PATENT OFFICE.

nAvIn 110M121, or onEvn-Lnnnonro. i nnaxnaorniirine nncnnnisn r'on Moron VEHICLES. Application fil ed'lttlay '14, 1923. Serial Noi-638,709.

To call 4117210722 z'tmay concern ing 1 are of'old and well known construe Be it known that I, DAVID F. DOMIZI, a tion, the "emergency brakesv being operated citizen of the United States; residing at by shafts-4e carried. by the housing 1 on op- Cleveland in the county ofCuyahoga and positesides of the differential "casing. the

; 5 State of hi0, have invented a certain new shafts 4 being provided with upwardly ex 6 and useful Improvement in Brake-Actuattending arms c onnected to brake rods 6; ing Mechanism for Motor Vehicles, of which The service brakes upon the exterior of the the following is a full, clear, and exact debrake'drums are actuated through sleeves 7 ri t-i which are rotatably mounted upon the This invention relates to brake mechashafts 4, the sleeves 7 being provided at. nism for motor vehicles, andhas for its obtheir inner ends with upwardly extending ject to provide a brake operating and equalarms 8- which are connected to the brake izing mechanism which can beassembled as rods 9. y Y a unit upon the torque tube and axle hous-- 5 At its forward end the torque tube 2 is v ing of a motor vehicle'and which can be provided with anoutturned flange 10 and tested and properly adjusted prior to the carries an extension in the-form of a tubular assembly of the chassis of the vehicle. casting ll which has arear flange adapted A further object is to provide an equalizto be'bolted to the flange 10 of the torque ing mechanism which is efiicient in opera fl tube 'anda flange 18 at its forward end tion, which can be economically nianufacadapted to be attached to the transmission tured and which can be quickly assembled. casing 23. Formed integrally with the cast- 7 With these and other objects in view the ing 11 and extending upwardly therefrom invention may be said to comprise the *eleupon opposite sides thereof are bearing ments and combinations thereof as shown brackets 1a and 15, the bracket 1 having scribed herein and particularly set-forth in arm 16 and the bracket 15 having a laterally T the appended claims, together with such offset rearwardly projecting arm 17. The variations and modifications thereof as will brackets 14; and 15 also have bearing arms be obvious to persons skilled in the art. 1 1S and 19 extending in directions opposite to Reference should be had to the accomthat of the arms 16 and 17. 'Journaled in operating members carried by the axle housangularly with respect to the shaft 20 and panyingjdrawings forming a part of the they forward ends of the arms 16 and 19is a specification in which Fig. 1 is a side eleva-' transverse shaft 20 which extends across the tion of the brake operating 'nechanism top of the casting 1'1 and serves to actuate showing the same mounted upon the torque the service brakes. Outside the arm 16 the tube and; axle housing of a motor vehicle; shaft 20 has lixed thereto an arm 21 which Fig 2 i f m tr l viewshowextends downwardly and is connected by ing the torque tube and axle housing of a means of a rod 22 with the service brake motor vehicle with the brake operating lever 23. Inside the bearing arm 16 the. mechanism mounted thereon; Figs.- 3 and shaft 20 hasrigidly securedthereto a down- 4 are a top 'planview and side elevation re wardly extending arnrz lthrough which the 95 spectively of the brake equalizing device service brake rods are operated. The arms mounted on the torque tube; Fig 5 is a rea 21 and 2st are pr vided. with Split COlltllS 1 ti f th b ak li i g mach 25 and 26 which are clamped upon the shaft nism; Fi'g. 6 is a sectional view showing one 20 by means of clampingbolts 27 and 28 means therefor; Fig. 7 is a section on hne 30 in the shaft 20 to prevent movement; of 7-7 of Fig 6. the arms longitudinally of the shaft. The Fi $1 d Q f th drawing show the portionsof the shaft engaged by the collars brake operating mechanism mounted upon 2 NlQG are provided with longitudinally the rear axle housingl and the torque-tube extending serrations 31 and 32 which are v 2 which surrounds the driving shaft and engaged by corresponding serrations 3S and connects the differential casing of the rear 34 upon the interior of the collars 25 and. axle with the transmission casing 3 toward 26. By loosening the clampingbolts 27 and the forward endofthevehicle. The brake 28, the arms 21. andQeLmay be adjusted no of the equalizing bars and the operating which engage in peripheral grooves 29 and 1m may be secured in any desired osition of angular adjustment. The shaft 21) has a reduced inner end which is journaled in the arm 19. lVithin the arm 19 a pair of spaced washers 36 and 37 are carried by the reduced portion ot ithe shaft 20. The inner washer 3'? bears against a shoulder at the end of the reduced portion 35 and the washer 3t; bears against the inner side of the arm it). A compression spring 38 is interposed between the washers 236 and 37 and serves to take up any longitudinal play of the shaft 20 to prevent rattling.

The arm is curved inwardly and has at its lower end a horizontally disposed cylindrical sleeve 39 which lies directly beneath the axis of the torque tube. An equalizing bar l0 extends through the sleeve 39 and has at the center thereof a ball enlargement 41 which fits slidably and rotatably within the cylindrical sleeve At one side of the ball enlargement all the bar 40 is provided with an ovalflange d2 the long diameter 01 which is substantially the same as the diameter of the ball enlargement. The flange 41-2 engages with an intin'ned flange 43 at one end of the sleeve 39 to limit the longitudinal movement of the equalizing bar. The oval llange engages with the interior of the sleeve at its upper and lower ends and prevents rocking movement of the equalizer bar ell) in a vertical direction. The sides of the flange l2, however, are spaced sutliciently. from the inner wall of the cylinder to permit the equalizing bar to swing horizontally about its center, the ball enlargement l-l forming a rocking support at the center of the equalizing bar. For retaining lubricant within the sleeve -19 and for preventing entry of dirt thereto the ends of the sleeve 39 are engaged by washers a l and which are slidably mounted upon the equalizing her ll). Spaced outwardly from the washers 44- and 4-5 are washers lo and 47 which are held against outward movement on the bar 40 by means of cotter pins l8 and 49. The washers ll and 45 are yieldiugly pressed against the ends of the sleeves E35) by means of compression coil springs and 51 interposed between the washers 4st and 46 and 45 and 47 respectively. The spring 50 is arelatively strong spring and serves to hold the flange 4-2 of the equalizing bar in engagement with the flange 43 of the sleeve. The spring 51 is a relatively weak spring and serves merely to hold the washer 4:5 in engagement with the end of the sleeve The outer ends of the equalizing bar 40 are provided with eyes 52 which are provided on one side with a concave ball seat and have tapered apertures leading to the concave seat. The eyes 52- are adapted to receive threaded ends of cnnnecting rod end pieces 5?), upon the ends 01 which are wing nuts 5;!-

which have ball ends titling in the concave sockets of the eyes 52. .liiearwardly ot' the equalizing bar 40 the end pieces 53 ot the connecting rods are provided with llanges 55 against which are seated the ends of com-- pression coil springs 56 which engage washers 56 at their il'orward ends which cover the enlarged ends of the tapered openings of the eyes 52 ot the equalizing bar ll). The coil springs 56 serve to yieldingly hold the eyes 52 in engagement with the ball ends of the wing nuts 54; and the washers 56 serve to retain lubricant within the ball and socket connection and to exclude dirt therefrom. The yielding connection between the equalizing bar and brake rods also prevents rattling The rear ends of the end pieces 53 are provided with forks 57 between which are clamped the steel ribbons 68 forming the body portion of the brake rods 9. lVhen the service brake lever is actuated in a forward direction, the arm 21 fixed to the shaft 20 is also swung in a forward direction, rocking the shaft 20 and the arm 2 t in a direction to move the equalizing bar ell) carried by the lower end of the arm 24; in a forward direction. Since the equalizing bar 4-0 has a horizontal rocking movement with respect to the supporting sleeve 39, the equalizing bar ll) will assume a position within the sleeve 39 Such that there will be equal tension upon the two service brake rods 9. Since the equalizing bar l0 is rotatably mounted in the sleeve 39, the swinging movement of the arm 24; will not cause rotative movement of the equalizing bar 40 and the equalizing bar is always properly positioned with respect to the brake rods regardless of the position of the arm 24: and rocks freely in a horizontal direction. An actuating shaft 69 extends transversely across the top of the torque tube and is journaled in the rearwardly extending arm 17 and 18 in exactly the same manner that the sha'l t 20 is journaled in the forwardly extending arms 16 and ll) and is provided with arms 70 and 71. upon the outer and in nor sides 0']? the bearing arm lT which correspond to the arms 21 and 2-1- on the shalt 20, the arm 70 being connected to (he emergency brake lever and the arm 71 carrying a sleeve 72 which is exactly the same as the sleeve 39 on the arm 3a. Extending through the sleeve 72 ot' the arm 71 is a horizontal equalizing bar '73 which is exactly the same as the equalizing bar 40 except that it is shorter. The arms 2e and 71 are substantially the same length and the outer ends of the equalizing bar 63 are connected to the en'iergency brake rods 6 which are positioned inside of the service brake rods 9 by means oi connections which are exactly the same as those described for connecting the equalizing bar 4-0 to the service brake rods 9. y y

Having described my invention, I claim I. In a motor veh icle,-a. rearaxle housing, a torque tube extending forwardly therefrom, a short tubular membe' adapted to form an extension of the torque tubeand to he detachably secured to theforward end thereof and to the transmission casing, brake movable actuating arm versely disposed sleeve at the endthereof,

operating members carried by the axle housing on opposite'sides of the torque tube, a brake equalizer carried bysaid member, and operatingconnections fromfsaid equalizer to sa-id-brake-operating members.

2. In a motor vehicle, a torque tube. extending, forwardly therefrom, a short tubular member adapted to form an extension of the torque tube and to be detachably secured to the forward end thereof and to the transmission casing, members on the axle for operating the service brakes, members on the axle for operating the emergency brakes, a pair of equalizers mounted on said tubular member, connecting one of said equalizers to the service. brake actuating members and the other of said equalizers to the emergency brake actuating members, i

3; A- brake equalizing device comprising a having a transan equalizing bar extending through said sleeve and having its central portion rockably mounted in said sleeve, and brake actu- ,ating-members attached to the outer ends of the bar,

4. A brake equalizing device comprising a movable actuating arm having a transversely disposed sleeve at equalizing bar extendingthrough said sleeve and rockably and rotatably mounted therein, and brake operating members attached to the outer ends of the bar.

5. YA brake equalizing movable actuating arm device comprising a having a cylindrlcal sleeve at the end thereof, an equalizing bar having a central ball enlargement fitting within the sleeve, stop members on the bar and sleeve for limiting the endwise movement of the equalizing bar in one direction but permitting the bar to rock about its ball enlargement, a spring for yieldingly pressing the bar against thestop, and brake operating members attached to the outer ends of the bar.

6. A brake equalizing device comprising a movable actuating arm having a cylindrical sleeve at the end thereof, an equalizing bar having'a central ball enlargement which has a sliding and rotating and provides a rocking support for the bar,

a shoulder witlnn a pair the opposite ends of the sleeve, a pair of coil springs carried bytthe bar and interposed between said washers and fixed stops on the bar, one of said springs serving to hold the a, rear axle housing, r-

and means the end thereof, an

neath the torque tube,

fit within the sleevev the sleeve for limiting the movement of the bar in one direction,

of washers slidable on the bar for closing baragainst the shoulder and the other of said springs being relatively weakand serving to retain the washer engaged thereby against the end of the sleeve.

7. The combination with the torque tube of a motor vehicle, of a casting secured'thereto, bearings-at the top of the casting, a shaft journaled in said bearings and extending transversely ofthe torque tube, two crank arl'nsfixed to said shaft, one of said crank arms adapted to be connected to a brake lever, the other'of said crank arms being bent inwardly to position its free end beneath the axis of the torque tube, an equalizing bar pivoted to the free end of said bent crank arm, and brake operating members connected to said equalizing bar.

8. The combination with the torque tube of" a motor vehicle, of an equalizing device mounted upon the forward end thereof, said equalizing device comprising a transverse shaft supported above the torque tube, two crank arms fixedto said shaft, one of said crank arms being adapted to be connected to the brake actuating lever, the other of said arms lying alongslde the torque tube and bent inwardly to position the free end thereof beneath the torque tube, a sleeve carried by the free: end of the bent crank arm, a transversely extending ably supported in said sleeve, and brake op: erating members connected to said bar.

9. The combination with thetorque tube of a motor vehicle, of an equalizing device mounted on the torque tube, said equalizing device comprising a member secured to the torque tube, front and rear bearings on said member above the torque tube, a pair of transverse shafts journaled in said bearings, an arm fixed to each of said shafts, said arms lying on opposite sides of the torque tube and havingrtheir freeends be transversely disposed equalizing bars pivoted centrally to the free ends of the arms, brake operating members connected to the free ends of the equalizing bars, and means for rocking the shafts.

10. In a motor vehicle, a torque tube enclosing the vehicle drive shaft, said torque tube having an outturned flange, at its forward end, a tubular member adapted to be slipped flange adapted to be bolted to the flange of the torque tube, bearings carriedby said member, a transverse crank shaft iournaled in said bearings, an arm fixed, to said shaft, an equalizing bar pivoted at its center to said arm, brake operating members connected to'theends of the arm, and means for rocking said crank shaft.

11. An equalizing (l6V1C0 comprising a movable actuating arm having a sleeve at equalizing bar-'rock- "over the drive shaft and having a ably and rotatably fitting in said sleeve, an

inturned stop shoulder carried by the sleeve, an oval shaped flange on the equalizer bar engaging said shoulder, and means for yieldingly holding said flange against the shoulder.

12. An equalizing device comprising a movable actuating arin having a sleeve at the free end thereof, an equalizing bar extending through said sleeve", said bar having a hall enlargement at the center thereof slid-ably and rotatably fitted in said sleeve,

an internal shoulder carried by the sleeve, an oval shapedflan-ge on the equalizer bar engaging said shoulder, Washers carried by the, sleeve for closing the ends of the sleeve. and opposed springs carried by the bar and engaging said \vasl'lers, one of said springs exerting greater pressure than the other whereby said flange is'held against said 20 shoulder.

In testnnonv whereof I hereunto allix my signature. v I

DAVID F. DOMTZI. 

